diff options
| author | Richard Henderson <rth@twiddle.net> | 2016-06-29 22:12:55 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-10-26 08:29:00 -0700 |
| commit | fdbc2b5722f6092e47181a947c90fd4bdcc1c121 (patch) | |
| tree | e28acccae721a37200503f6983edf56b42b9d4a4 /include | |
| parent | 1edaeee0955fba7d834b7c8f4e372e7eae030745 (diff) | |
| download | qemu-fdbc2b5722f6092e47181a947c90fd4bdcc1c121.tar.gz | |
tcg: Add EXCP_ATOMIC
When we cannot emulate an atomic operation within a parallel
context, this exception allows us to stop the world and try
again in a serial context.
Reviewed-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/cpu-all.h | 1 | ||||
| -rw-r--r-- | include/exec/exec-all.h | 1 | ||||
| -rw-r--r-- | include/qemu-common.h | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 861260d3db..e9004e5798 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -31,6 +31,7 @@ #define EXCP_DEBUG 0x10002 /* cpu stopped after a breakpoint or singlestep */ #define EXCP_HALTED 0x10003 /* cpu is halted (waiting for external event) */ #define EXCP_YIELD 0x10004 /* cpu wants to yield timeslice to another */ +#define EXCP_ATOMIC 0x10005 /* stop-the-world and emulate atomic */ /* some important defines: * diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 9797d556e8..cb624e4acc 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -59,6 +59,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, void QEMU_NORETURN cpu_loop_exit(CPUState *cpu); void QEMU_NORETURN cpu_loop_exit_restore(CPUState *cpu, uintptr_t pc); +void QEMU_NORETURN cpu_loop_exit_atomic(CPUState *cpu, uintptr_t pc); #if !defined(CONFIG_USER_ONLY) void cpu_reloading_memory_map(void); diff --git a/include/qemu-common.h b/include/qemu-common.h index 7e6e4feb4b..1430390eb6 100644 --- a/include/qemu-common.h +++ b/include/qemu-common.h @@ -80,6 +80,7 @@ void tcg_exec_init(unsigned long tb_size); bool tcg_enabled(void); void cpu_exec_init_all(void); +void cpu_exec_step_atomic(CPUState *cpu); /** * set_preferred_target_page_bits: |